Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"Forest sites"”.
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Biogeochemical Investigations in Old Growth and Disturbed Forest Sites at Mount Kilimanjaro
Areas covered by mountain rainforests in East Africa have important functions as catchment areas for the streams in the savannah. Still, little is known about the biogeochemical processes in these often threatened ecosystems. The current study aims to present basic information on soils and …
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Analysis of the baling concept for increased fiber recovery on harvested forest sites
The feasibility of baling forest residues has been ascertained by examining three segments of the baling concept. These are: the in-woods evaluation of baling; the transportation aspects of the baling concept; and the utilization of baled forest residues for energy production at pulp and paper …
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Application of a New Tree-Ring Based Drought Reconstruction Method at Multiple Forest Sites Across Indiana, U.S.A.
… to a single species (SS) in four old-growth forests in Indiana: Pioneer Mothers Memorial Forest (PM), Donaldson Woods (DW), Hoot Woods (HW), and Lilly Dickey Woods (LD). The objectives of this study were to [1] evaluate the climate response of all chronologies (<em>n</em> = 19; 7 species) to …
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Savanna Restoration Through Prescribed Fire: Demographic and Physiological Responses of Oak and Hickory Seedlings and Saplings to a Changing Light Environment
… oak savannas, and varying fire histories. Study sites representing unburned closed forest (N=2) and recently burned closed forest (n=2) were established in 2001. Twelve belt transects with an average area of 102m² were established and sampled to determine indirect links between fire history …
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Habitat overlap and seroprevalence of toxoplasma gondii in wildlife and feral cats in a natural area
… livestock, pets, and wildlife. I selected 4 forest sites within the interior of the park and 4 edge sites within 300 m of human buildings. Feline and wildlife occurrence in the natural area was determined using scent stations, motion detection cameras, and overnight live trapping. Amount of …
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Inhibition of Canopy Tree Seedlings by Thickets of <I>Rhododendron maximum</I> L. (Ericaceae) in an Eastern Deciduous Forest
… large areas of the understory in the deciduous forests of the southeastern United States. Thickets of R. maximum are inhibitory to recruitment and regeneration of many understory plants including canopy tree seedlings. By effectively lowering the survivorship of woody species trying to establish …
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Evaluation of Cattle Use of A Deer Winter Range in the Black Hills
… the summer grazing seasons of 1971-1972. A U.S. Forest Service grazing allotment situated between Mystic and Redfern, South Dakota, was used as the study area. The allotment was divided into five grazing units or pastures managed collectively under a “rest-rotation” system of grazing. Three study …
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The soil seed bank in Agathis australis (D. Don) Lindl. (kauri) forests of northern New Zealand and its potential role in secondary successions
… in Agathis australis (D. Don) Lindl. (kauri) forests of northern New Zealand is quantified, and its potential role in secondary successions examined. Seed bank data from a number of kauri forest sites stratified by successional time and distance from forest edges are summarized using Detrended …
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Exotic Bird Invasion Into Forests of Hawaii: Demography, Competition, and Seed Dispersal
… dispersed all common native plants in these forest sites but non-native plants were infrequently eaten and dispersed. Furthermore, introduced birds are effectively dispersing native seeds from native forest into adjacent sites currently dominated by non-native plants, allowing native forest …
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Improving estimation of gross primary productivity of terrestrial ecosystems
… developed. It has been employed for the Harvard Forest site, the Howland Forest site, the Walker Branch Watershed Forest site, the km67 Forest site in tropic, a soybean site in Nebraska, the Xilingol grassland site in China, the Bartlett Experimental Forest site, and two broadleaf deciduous …
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Nitrogen dynamics after site preparation in three loblolly pine plantations on the Virginia Piedmont
… as possible causes of productivity declines on forest sites in Australia and New Zealand. This study was initiated in order to determine the effects of site preparation intensity upon N distribution and availability in loblolly pine (Pinus taeda L.) plantations in Virginia. In the summer of …
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Soil compaction caused by timber harvesting in central Appalachian hardwood forests
… monitored in two central Appalachian hardwood forest sites. Examinations of soil bulk density (lbs/ft 3) were made pre-harvest and post-harvest for each harvest unit. Observations were conducted along the skid roads in conjunction to distance from the landing. Sample points were also taken …
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Bird use of avocado farms and intact forest in the Dominican Republic
… an increase of avocado farms and a subsequent forest loss. We conducted point-count bird surveys to determine how avian species richness and diversity differ between avocado farms and intact forest, as well as how vegetation differences between farms and forests could impact bird use. We found …
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Native Bees and Pollen Collection: How Flexible Are They?
… flowering plants from agricultural and remnant forest sites in the Yarra Valley, Victoria. Pollen was transferred from the bees and taken through acetolysis before being mounted on microscope slides. With the assistance of the Specicount tool, pollen on these slides was identified and counted …
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Native Bees and Pollen Collection: How Flexible Are They?
… flowering plants from agricultural and remnant forest sites in the Yarra Valley, Victoria. Pollen was transferred from the bees and taken through acetolysis before being mounted on microscope slides. With the assistance of the Specicount tool, pollen on these slides was identified and counted …
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WHITE SPRUCE (PICEA GLAUCA), MOOSE (ALCES ALCES) AND THE ORIGIN OF A ZOOTIC DISCLIMAX COMMUNITY ON ISLE ROYALE
… combined with canopy loss alters trajectories of forest succession, and in extreme cases may produce novel landscapes dominated by the groundcover layer. I investigated the response of woody species to savannas which have emerged in Isle Royale National Park as a result of moose herbivory. I used …
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Targeting Nonindustrial Private Forest Landowner Groups for Timber Market Entry
… prices both for harvesting timber from existing forest land and for afforestation of marginal agricultural and abandoned land. An important conclusion drawn from these models is that financial returns are not the only drivers of these decisions. Preferences for amenities derived from forests and …
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Production and cost analysis of two harvesting systems in central Appalachia
… operations in central Appalachian hardwood forest sites in order to obtain time study data. Production and cost analysis were conducted on the harvesting system data in order to compare the two systems. Chainsaw felling productivity was 363.4 ft3/PMH (2180.4 bdft/PMH) and unit cost was …
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The Direct and Indirect Effects of Insectivory by Birds in Two Neotropical Forests
Most forest birds include herbivorous arthropods in their diet. Experimental tests of whether bird predation can affect arthropod abundance and plant damage are few, however, and restricted to saplings in relatively low diversity systems. In two lowland tropical forests, I tested whether birds …
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The Biodiversity Mirage: the Effects of Habitat Degradation and Exotic Predators on Ground-Dwelling Forest Birds, Tenrecs and Lemurs in Northeastern Madagascar
… was to examine the response of ground-dwelling forest birds, tenrecs (Lipotyphla: Tenrecidae) and lemurs to habitat degradation and the presence of exotic predators, and monitor population trends at resurveyed sites from 2008 to 2013. Using camera trap surveys and distance sampling, we observed …
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